Music Hiccups - iOS 4?

Since installing iOS4 on my iPod Touch 2nd Gen, I've noticed some occasional hiccups in the music when I turn it on and off. I use my Touch at work to listen to podcasts and music with headphones. I start an album or playlist and then turn the Touch screen off. Upon clicking the Sleep/Wake button to turn it off, there is a slight pause or hiccup in the music, just a split second. The same happens when I Slide to Unlock.

Is anyone else noticing this? I'm pretty sure it was not happening before I installed iOS 4. If it had been, I don't think I would be noticing it now.